... .Wall Thickness: 0.8-18mm Square steel tube 1.Grade:Q195 Q235 Q3452.Side Length: ... 000 US dollar. The company has a prefect system of products manufacturing, processing, shipping and warehousing ... Steel Pipe ,Welded Steel Pipe ,Square/Rectangle Steel Tube etc.) ,Light/Heavy Steel Rail and so on ... , a strong business network and excellent service system and world-class professionals, we win our customers ...